Class Cycadopsida Brongniart 1843 (cycads)
Parent taxon: Cycadophyta according to A. B. Doweld 2001
Sister taxa: Pachytestopsida, Phasmatocycadopsida
Subtaxa: Boweniaceae, Cycadales, Dioales, Gnetales, Lagenostomales, Stangeriaceae, Trigonocarpales, Welwitschiales